Sprinkle Knox over cold water and set aside to soften, stir over low heat until dissolved. Beat creamcheese with sugar until fluffy, gradually add evaporated milk and lemon juice. Gradually beat in Knox mixture, Amaretto and vanilla until blended. Fold in the whipped topping. Pour into crust and chill. Garnish with "balls" of whipped topping dotted with marachino cherries and sprinkled with sliced almonds and drizzled with ribbons of melted chocolate chips.